■ PRINCIPAL SOURCES CONSULTED 



CATALOGS: 



U. S. Department of Agriculture Card Catalog, including Plant Science and Plant Pathology Catalogs. 



BIBLIOGRAPHICAL AND ABSTRACT JOURNALS: 



Agricultural Index, 1919-1949. 

 ■ 1 Bibliography of Agriculture, July 1942- May 1950. 



Biological Abstracts, 1926-1946. 

 Experiment Station Record, 1920-1946. 

 " . Horticultural Abstracts, 1931-1949. 



International Institute of Agriculture. Bibliography of Tropical Agriculture, 1931-1942. 

 Review of Applied Entomology, Ser. A: Agricultural, 1922-1949. 

 Review of Applied Mycology, 1922-1948. 



SERIALS: 



Agricultural Society of Trinidad and Tobago, Proceedings, 1919-1949 (file incomplete). 



Bergcultures, 1926-1949 (file incomplete). 



Cacao Information Bulletin, Nov. 1947-Jan. 1950. 



Gold Coast Agricultural and Commercial Society. Journal, 1921-1927. 



Gold Coast Farmer, 1934-1939. 



Office Internationale du Cacao et Uu Chocolat. Bulletin Officiel, 1931-1939 (file incomplete). 



Revue Internationale de Botanique Appliqu6e et d' Agriculture Tropicale, 1921-1945. 



Tropical Agriculture, 1924-1949. 



